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| All Patents in class 62/509 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,065,485 | Dec. 22, 1936 | D.D. Wile | Refrigerating Apparatus | refrigeration apparatus | |
| 2,558,938 | Jul. 03, 1951 | T.E. Noakes, E.J. Dillman | Heat Pump and Control Means | heating apparatus | |